haebis



(No Model.)

J. P. 8u C.. T. HARRIS.

WINDLASS PQR BLBVATORS.

A Patented Aug. 10, 1886.

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' UNITED STATES PATENT OFFICE.

JOHN P. HARRIS AND CHARLES T.. HARRIS, OF NEVBURG, NEV YORK.

WINDLASS FOR .ELEVATO RS.

SPECIFICATION forming partrof Letters Patent No. 347,239, dated Augustl0, 1886.

' Application filed March Q3, 1886. Serial No. 196,265. (No model.)

To all whom z'tmay concern:

Be it known that we, J oIIN l. HARRIS and CHARLEs T. HARRIS, citizens ofthe United States, residing at Newburg, in the-county of Orange andState of `New York, have iuvented certain new and useful Improvements inVVindlasses for Elevators; and we do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesaine, reference being had to the accompanying drawings, and to theletters and figures of reference marked thereon,which form apart of thisspecification.

Figure l is a top View of our improved ele-v vating device. Fig. 2 is anend view showing the endless-ropewheelin dotted lines. Fig. 3 is an endview of therope-wheel, its sheavehanger, and sheaves. Fig. 4 is atopview of the hanger and its sheaves. Fig. 5 is a detail showing themanner of applying the adjustable cam on the drum-shaft. Fig. 6 showsviews of the adjustable side cam.

This invention relates to windlasses which are especially designed foruse in raising and lowering dumb-waiters, light hand-elevators, and forother like purposes, and our objects are to so construct the device thatit will hold its load safely at any point wit-hout allowing the same tocasually run down. It is accessible from all floors of a house at alltimes, and it requires no weight to counterbalance the load, thusdispensing with the casing which usually incloses acounter-balancing'-weight, by which casing fire is oftencommunicatedfrom one floor to another. We attain these objects by mechanism whichwill be fully understood from the following description, when taken inconnection with the annexed drawings.

Referring to the drawings by letters, A designates a hollow drum, aroundwhich passes the rope by which the weight to be raised or lowered issuspended. This drum .is loosely applied upon a shaft, B, which issuitably sustained. by journal-boxes upon horizontal beams B' B2, asshown in Fig. l. The drum is provided at one end with an annularoutwardlyflaring friction-clutch, F, and at the other end with acombined clutch and side cam, Z, (shown 'in Figs. l and 5,) and iscomposed of-the two parts C D. In close relation to the beveled face ofthe part C is a part, D, which is rig'- idly secured on the shaft B bymeans of screwthreads and jam-nuts. By loosening the latter this part Dcan be adjusted endwise on its shaft, for a purpose hereinafterexplained.

I designates afriction-disk, which is rigidly secured on the shaft B.

G is a male friction-clutch, which is tapered, as shown in Fig. 1, tocorrespond with the flaring cavity in the female clutch F, into which itis adapted to fit. This male portion of the clutching device and aratchet-wheel, H, are cast entire, or they may be cast separate andrigidly secured together; and with the teeth of this ratchet-wheelengages apawl, k, which is pivoted to the beam B'. The male clutch G and`its -wheel H are loose on the shaft B, and are allowed to turn only inone direction, (indicated bythe arrow on Fig. 2,) they being preventedby the pawl 7c from turning in the opposite direction. n

By the action of the inclined or beveled faces of the side cams, C andD, on each other, the drum A, with its female clutch F, and the maleclutch, are moved endwise on the shaft B, thus prodhcing friction tosuch a degree between the impinging surfaces of said clutch and its maleportion G and the ilat end a of this portion and the disk I that thedrum A is prevented from slipping, thus allowing the suspension-rope tobe wound upon it and a load to be raised or lowered safely.

The male portion G of the clutch is cast with pockets in its taperedface, and pockets are also formed in the iiat face a of this lportion G,opposite the disk I, the latter being in dotted lines, which pockets arefilled with wood or other suitable substance which will produceconsiderable friction against their impinging metal surfaces, and at thesame time be durable.

The part D of the side cam, Z, is adjustable endwise on the shaft B,forthe purpose of compensating for the wear of the friction-surfacesabove described. y

M designates an iuverted-V-shapcd hanger or saddle, which straddlesfreely the shaft B, and is provided with two grooved sheaves, N N, onits lower ends, which sheaves lie directly beneath a ropewheel, L, andrevolve freely in their bearings, the rope passing between the IOO WheelL and the sheaves N N. The sheavehanger is allowed free lateralvibration, and the sheaves always keep the same circle of rope on therope-wheel L, which prevents this rope from slipping, and in whicheverdirection the rope?) may be hauled one of the sheaves will always pressit up against said wheel.

Having described our invention, what we claim is- 1. In a device forraising and lowering` weights, the combination of the rope-winding drum,its side cam and female friction-clutch loosely applied on the drumshaft, the male friction-clutch and its ratchet-wheel loose on theshaft, a pawl adapted to engage with this ratchet-wheel, and aropewvhcel keyed on the drum-shaft, all adapted to operatesubstantiallyin the manner and for the purposes described.

2. The combination, with the drum A, its clutches, ratchet-wheel andpawl, and side ealns, as described, of the hanger M, loosely applied onthe drum-shaft and provided with sheaves adapted to prevent the rope bfrom slipping on the ropewheel, substantially as described.

3. The combination, with the drnni A, provided with a flaring femalefriction eluteh at one end and a side cam at the other end and looselyapplied on its shaft B, of the tapered male friction clutch and itsratchet wheel, also loosely applied on this shaft, the pawl engagingwith the ratchet-wheel, a rope-wheel, L, and a side cam adj nstablyapplied on said shaft, for the purpose described.v

4. The combination of the drum A, p rovided with a side cam on one endand a female friction-clutch on the opposite end, and applied loosely onthe drum-shaft, the side cam, Z, adjustable on this shaft, the malefrictionclnteh and its ratchet-wheel loose ou the shaft, the pawlengaging with the ratchet-wheel, a disk, I, fast on the said shaft, arope-wheel, and a hanger bearing sheaves for preventing` the ropeslipping,r on this wheel, substantially as and for the purposesdescribed.

In testimony whereof weaflix our signatures in presence of twowitnesses.

JOHN P. HARRIS. CHARLES T. HARRIS.

Vitnesses:

CHAs. A. DIXON, LEWIS M. SMITH, J r.

